Thanks for the hint. I checked my HT-37 and,,,, yes it uses the same OAK switch module. SOOOO I am now looking for the switch module from a HA-20, HA-1, HT-37 and I am not sure about the HT-32. Best Regards, Walt Cates, WD0GOF, JOHN 2:1-4 My home town http://www.youtube.com/watch?v=PJk8XIPEDeI<http://www.youtube.com/watch?v=PJk8XIPEDeI>